Apple's Beats brand in April unveiled the Powerbeats Pro, a redesigned wire-free version of its popular fitness-oriented Powerbeats earbuds.
Apple Accelerates Mac OS X 10.5.5 Seeding (9F17)
While difficult to predict when Apple will release this version to the public, accelerated releases with "no known issues" tend to be signs of an impending release.
Apple last updated Mac OS X with version 10.5.4 on June 30th, 2008. The next release will be a free update and is expected to incorporate over a hundred bug fixes.